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rOACCT/node_modules/core-js/internals/array-buffer.js
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array-buffer.js
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'use strict';
var global = require('../internals/global');
var uncurryThis = require('../internals/function-uncurry-this');
var DESCRIPTORS = require('../internals/descriptors');
var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-basic-detection');
var FunctionName = require('../internals/function-name');
var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
var defineBuiltIns = require('../internals/define-built-ins');
var fails = require('../internals/fails');
var anInstance = require('../internals/an-instance');
var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
var toLength = require('../internals/to-length');
var toIndex = require('../internals/to-index');
var IEEE754 = require('../internals/ieee754');
var getPrototypeOf = require('../internals/object-get-prototype-of');
var setPrototypeOf = require('../internals/object-set-prototype-of');
var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
var defineProperty = require('../internals/object-define-property').f;
var arrayFill = require('../internals/array-fill');
var arraySlice = require('../internals/array-slice-simple');
var setToStringTag = require('../internals/set-to-string-tag');
var InternalStateModule = require('../internals/internal-state');
var PROPER_FUNCTION_NAME = FunctionName.PROPER;
var CONFIGURABLE_FUNCTION_NAME = FunctionName.CONFIGURABLE;
var getInternalState = InternalStateModule.get;
var setInternalState = InternalStateModule.set;
var ARRAY_BUFFER = 'ArrayBuffer';
var DATA_VIEW = 'DataView';
var PROTOTYPE = 'prototype';
var WRONG_LENGTH = 'Wrong length';
var WRONG_INDEX = 'Wrong index';
var NativeArrayBuffer = global[ARRAY_BUFFER];
var $ArrayBuffer = NativeArrayBuffer;
var ArrayBufferPrototype = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
var $DataView = global[DATA_VIEW];
var DataViewPrototype = $DataView && $DataView[PROTOTYPE];
var ObjectPrototype = Object.prototype;
var Array = global.Array;
var RangeError = global.RangeError;
var fill = uncurryThis(arrayFill);
var reverse = uncurryThis([].reverse);
var packIEEE754 = IEEE754.pack;
var unpackIEEE754 = IEEE754.unpack;
var packInt8 = function (number) {
return [number & 0xFF];
};
var packInt16 = function (number) {
return [number & 0xFF, number >> 8 & 0xFF];
};
var packInt32 = function (number) {
return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
};
var unpackInt32 = function (buffer) {
return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
};
var packFloat32 = function (number) {
return packIEEE754(number, 23, 4);
};
var packFloat64 = function (number) {
return packIEEE754(number, 52, 8);
};
var addGetter = function (Constructor, key) {
defineProperty(Constructor[PROTOTYPE], key, { get: function () { return getInternalState(this)[key]; } });
};
var get = function (view, count, index, isLittleEndian) {
var intIndex = toIndex(index);
var store = getInternalState(view);
if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);
var bytes = getInternalState(store.buffer).bytes;
var start = intIndex + store.byteOffset;
var pack = arraySlice(bytes, start, start + count);
return isLittleEndian ? pack : reverse(pack);
};
var set = function (view, count, index, conversion, value, isLittleEndian) {
var intIndex = toIndex(index);
var store = getInternalState(view);
if (intIndex + count > store.byteLength) throw RangeError(WRONG_INDEX);
var bytes = getInternalState(store.buffer).bytes;
var start = intIndex + store.byteOffset;
var pack = conversion(+value);
for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
};
if (!NATIVE_ARRAY_BUFFER) {
$ArrayBuffer = function ArrayBuffer(length) {
anInstance(this, ArrayBufferPrototype);
var byteLength = toIndex(length);
setInternalState(this, {
bytes: fill(Array(byteLength), 0),
byteLength: byteLength
});
if (!DESCRIPTORS) this.byteLength = byteLength;
};
ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE];
$DataView = function DataView(buffer, byteOffset, byteLength) {
anInstance(this, DataViewPrototype);
anInstance(buffer, ArrayBufferPrototype);
var bufferLength = getInternalState(buffer).byteLength;
var offset = toIntegerOrInfinity(byteOffset);
if (offset < 0 || offset > bufferLength) throw RangeError('Wrong offset');
byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
if (offset + byteLength > bufferLength) throw RangeError(WRONG_LENGTH);
setInternalState(this, {
buffer: buffer,
byteLength: byteLength,
byteOffset: offset
});
if (!DESCRIPTORS) {
this.buffer = buffer;
this.byteLength = byteLength;
this.byteOffset = offset;
}
};
DataViewPrototype = $DataView[PROTOTYPE];
if (DESCRIPTORS) {
addGetter($ArrayBuffer, 'byteLength');
addGetter($DataView, 'buffer');
addGetter($DataView, 'byteLength');
addGetter($DataView, 'byteOffset');
}
defineBuiltIns(DataViewPrototype, {
getInt8: function getInt8(byteOffset) {
return get(this, 1, byteOffset)[0] << 24 >> 24;
},
getUint8: function getUint8(byteOffset) {
return get(this, 1, byteOffset)[0];
},
getInt16: function getInt16(byteOffset /* , littleEndian */) {
var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
},
getUint16: function getUint16(byteOffset /* , littleEndian */) {
var bytes = get(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
return bytes[1] << 8 | bytes[0];
},
getInt32: function getInt32(byteOffset /* , littleEndian */) {
return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
},
getUint32: function getUint32(byteOffset /* , littleEndian */) {
return unpackInt32(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
},
getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
return unpackIEEE754(get(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
},
getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
return unpackIEEE754(get(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
},
setInt8: function setInt8(byteOffset, value) {
set(this, 1, byteOffset, packInt8, value);
},
setUint8: function setUint8(byteOffset, value) {
set(this, 1, byteOffset, packInt8, value);
},
setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
},
setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
set(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
},
setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
},
setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
set(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
},
setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
set(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
},
setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
set(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
}
});
} else {
var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME && NativeArrayBuffer.name !== ARRAY_BUFFER;
/* eslint-disable no-new -- required for testing */
if (!fails(function () {
NativeArrayBuffer(1);
}) || !fails(function () {
new NativeArrayBuffer(-1);
}) || fails(function () {
new NativeArrayBuffer();
new NativeArrayBuffer(1.5);
new NativeArrayBuffer(NaN);
return NativeArrayBuffer.length != 1 || INCORRECT_ARRAY_BUFFER_NAME && !CONFIGURABLE_FUNCTION_NAME;
})) {
/* eslint-enable no-new -- required for testing */
$ArrayBuffer = function ArrayBuffer(length) {
anInstance(this, ArrayBufferPrototype);
return new NativeArrayBuffer(toIndex(length));
};
$ArrayBuffer[PROTOTYPE] = ArrayBufferPrototype;
for (var keys = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys.length > j;) {
if (!((key = keys[j++]) in $ArrayBuffer)) {
createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);
}
}
ArrayBufferPrototype.constructor = $ArrayBuffer;
} else if (INCORRECT_ARRAY_BUFFER_NAME && CONFIGURABLE_FUNCTION_NAME) {
createNonEnumerableProperty(NativeArrayBuffer, 'name', ARRAY_BUFFER);
}
// WebKit bug - the same parent prototype for typed arrays and data view
if (setPrototypeOf && getPrototypeOf(DataViewPrototype) !== ObjectPrototype) {
setPrototypeOf(DataViewPrototype, ObjectPrototype);
}
// iOS Safari 7.x bug
var testView = new $DataView(new $ArrayBuffer(2));
var $setInt8 = uncurryThis(DataViewPrototype.setInt8);
testView.setInt8(0, 2147483648);
testView.setInt8(1, 2147483649);
if (testView.getInt8(0) || !testView.getInt8(1)) defineBuiltIns(DataViewPrototype, {
setInt8: function setInt8(byteOffset, value) {
$setInt8(this, byteOffset, value << 24 >> 24);
},
setUint8: function setUint8(byteOffset, value) {
$setInt8(this, byteOffset, value << 24 >> 24);
}
}, { unsafe: true });
}
setToStringTag($ArrayBuffer, ARRAY_BUFFER);
setToStringTag($DataView, DATA_VIEW);
module.exports = {
ArrayBuffer: $ArrayBuffer,
DataView: $DataView
};
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